Home / 20,831.13-28,746.83-11,270.99

Finding the Fourth Proportional to 20,831.13, 28,746.83 and 11,270.99

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Solution

The fourth proportional to 20,831.13, 28,746.83 and 11,270.99 is: 15,553.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.13 : 28,746.83 = 11,270.99 : x
  2. Step 2: Convert to fraction form
    20,831.13/28,746.83 = 11,270.99/x
  3. Step 3: Cross multiply
    20,831.13x = 28,746.83 × 11,270.99
  4. Step 4: Simplify right side
    20,831.13x = 324,005,033.37
  5. Step 5: Solve for x
    x = 324,005,033.37/20,831.13
  6. Step 6: Final answer
    x = 15,553.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.